I am working with CNC routers and a lot of MDF, which is great UNLESS you need to paint the edges which are furry in some spots and all open and porus everywhere else.
I build plinths that need to be enamel smooth and show no seams or texture changes.
I have tried so far
Watered PVA (does not capture the hairs, cannot be sanded back as it does not penetrate very far)
Builders bog/Bondo (to sticky to apply easily, high build means sanding it back tends to eat away at the corners)
Automotive Primer-Filler spray, a perfect finish.... in only 18 coats.
Fine spackle filler (terrible texture)
Does anyone out there have the magic bullet?
I'm wondering of a lighter sealant or resin would wick into the wood deeper? Run a torch over the hairy bits?